Destroy when done.

fuseutil/file_system.go

@@ -90,7 +90,12 @@ type fileSystemServer struct {
 }
 
 func (s *fileSystemServer) ServeOps(c *fuse.Connection) {
-	defer s.opsInFlight.Wait()
+	// When we are done, we clean up by waiting for all in-flight ops then
+	// destroying the file system.
+	defer func() {
+		s.opsInFlight.Wait()
+		s.fs.Destroy()
+	}()
 
 	for {
 		op, err := c.ReadOp()

mounted_file_system.go

@@ -27,7 +27,8 @@ import (
 // A type that knows how to serve ops read from a connection.
 type Server interface {
 	// Read and serve ops from the supplied connection until EOF. Do not return
-	// until all operations have been responded to.
+	// until all operations have been responded to. Must not be called more than
+	// once.
 	ServeOps(*Connection)
 }